Refrigerating-machine.



J. RBBSAMEN.

REFRIGERATING MACHINE.

APPLICATION FILED JUNE 9, 1913. I mms o Patented Ja11.20,1914.

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J. RBBSAMEN.

REFRIGERATING MACHINE.

APPLICATION FILED JUNE 9, 1913.

1,084,962, Patented Jan. 20, 1914;

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J. REBSAMEN.

REFBIGERATING MACHINE.

APPLIGATION FILED JUNE 9, 1913.

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Patented. Jan 20 UNITED STATES J'UtIUs REBSAMEN, or cam-case, iiitrnols as'rmeammmanecmfia Specification of Iletters Patent.

Patented Jan. 2o,- 1914 Application filed June 9, 1913': Serial No. 772,662.

To all whom it may concern:

Be it known that I, JULIUS REBSAMEN, a

citizen of the United States, residing at Chi-- cage, in the county of Cook and State of Illinois, have invented'a new and useful Improvement in RefrigeratingMachines, of

which the following is a specification.

My invention relates to an improvement in the class of refrigerating (including ice) machines employing a gas liquefiable under mechanical compression to produce cold by its expansion.

I have devised my improvement for use, more particularly, in machines employing anhydrous. ammonia as the refrigerating medium; and its primary object is to employ the back-pressure from the condenser coils to automatically and instantaneously close thevalve at the suction-side of the compressor in the event of a break in the latter orits' immediate connections,'and thereby confine to the same the loss of ammonia there-from in such event.

In the accompanying drawings, Figure 1 shows my improvement, by a view in elevation, operatively connected with an ammonia-refrigerating machine, of which suflicient is illustrated to enable my invention and its operation to be readily understood by those skilled in the art; Fig. 2 is a broken view showing details of construction of the mechanism for tripping the valve at the suction-side of the compressor; Fig. 3 is an enlarged view in sectional elevation of the housed mechanism through the medium of which the tripping function is performed; Fig. 4c is a section on line 4, Fig. 3, and Fig. 5 is a section on line 5, Fig. 3. I

From one side of the compressor 6 leads the discharge-pipe 7, which goes to the condenser (not shown). This pipe contains the usual normally-open shut-off valve 8, and the usual check-valve 9 adapted to close under back-pressure from .the condenser. Into the opposite side of the compressor leads the suction-pipe 10, containing a normally-open shut-off valve 11 on a stem 12 having a head 13 on its outer end to work in a guide-recess 14 provided in the outer end of a bracket 15 forming a bearing for a set-screw 16, which may be used to close the valve 11 by hand when desired. V

The parts thus far described need present no features of novelty.

A fiat-sided housing 17 having an elongated top-opening 18, and which may be formed of sheet-metal, seats on a hollow metal base 19 containing vertical cylinders 20 and 21,- which are plugged at their lower ends; and from the top of the base, midway between the cylinders, rises a post 22' On this post is fulcrumed between the ends of adapt it to be rocked, as and for the urpose hereinafter explained; the fulcrum 22 being preferably of the knife-edge variety illustrated in Fig. 3, and the head being double, as illustrated, with the stem on only one of the two heads. Plunger's 20 and 21 Work, respectively, in the cylinders 20 and 21, which are suitably packed at their upper ends; and these plungers are provided on their upper ends with knobs,- as shown, to work with the least friction in recesses formed centrally in the heads of flanged thimbles 22,- between which and fianged'collate 23 are confined coiled springs 24. From opposite ends of the lever-head depend, through the collars 23 into the thinlbles 22, rods 25,- screw-threaded about their upper sections; and nuts 26 work on the threads against the collars to compress the springs for regulating their tension: The rods are hung on knife-edged pivots 25 extending between and having their bearings inn the opposite heads, as clearly shown in A link-rod 27 connects the stem of the lever 24 with (me arm of abell-crank 28 fulcrumed at its angle on a catch 29 pivot-ally supported at one end on the bracket 15. In an opening through this catch is areciprocable bolt 30 with its lower end bearing connects the discharge-pipe 7,- at a point between the condenser and the check-valve 9, with the cylinder QO'below the plunger therein, and a, similar pipe 37 connects the compressor, at a point between the latter and the check-valve 9, with the cylinder 21 "at a corresponding point in the latter.

As represented in Fig. 1, the parts are in their normal condition while thecompressor its head a lever 24,- of general T-shap'e, to

against the shorter arm of the bell-crank is operating. The pressure through the pipes 36 and 37 is exerted equally against the plungers 20 and 21', and the tension of the springs 24 is set to resist that pressure when normal, though if it rises above normal, the resultant rise of the plungers will compress both springs equally, thus without tilting the head of the lever 24. The moment, however, that a break occurs at any point between the check-valve 9 and valve 11, as by blowing out a compressorhead, the resultant reduction of pressure in the pipe 37 weakens its resistance to the plunger 21', and thefull pressure in the pipe 36, which the check-valve 9 shuts oif from the compressor, is exerted against the plunger 20. The resultant rise of the lastnamed plunger tilts the lever 24 on its fulcrum 22 in the direction to exert a pull on the link-rod 27 and press the bell-crank 28 against the bolt '30 and thereby trip the pivotal catch 29 out of engagement with the lever 33. This lever being thus released, ermits the weighted arm 34 to drop, an in dropping it turns the lever 32, by its connection with the head 13, to force the yalvestem 12 in the direction to close the valve 11. Thus, as will be seen whenever a break of the character described occurs, the ammonia contained in the system is locked therein against loss, except the portion thereof that is in the compressor and in the pipe-sections immediately connected with it.

I realize that considerable variation is possible in the details of construction here'- in specifically shown and described, and I do not intend by illustrating a single, specific or preferred embodiment of my invention to be limited thereto; my intention being in the following claims to claim protection for all there may be of novelty in my invention as broadly as the state of the art will permit. a

What I claim as new and desire to secure by Letters Patent is 1. In a refrigerating machine of the character described, the combination with the compressor having a suctionipe containing ashut-ofi valve and a scharge-gi3 e containinga check-valve, of weighted ca mechanism locking said shut-cit valve in its normally-open condition, and means actuated by variation in ressure in the gas-discharge line at opposite sides of said checkvalve to close said shut-oil? valve, for the purpose set forth.

2. In a' refri crating machine of the character describe the combination with the compressor having a suction-pipe containing a shut-off valve provided with a reciprocating valve-stem and a dischar e-pi e containing a check-valve, of a brac et jacent to theshut-ofi' valve, in whichthe reclp'roeating valve-stem is guided, a catch-device on the bracket, a lever fulcruinedon the oeaeea bracket having one arm connected with the valve-stem and its other arm normally engaged by the catch of said device, said lever being weighted to throw it for closing the shut-off valve, andmeans actuated byvariation in pressure in the gas-discharge line at opposite sides of said check-valve to trip the catch-device and release the lever and permit the weight to close the shut-cit valve, for the purpose set forth.

3. In a refrigerating machine of the character described, the combination with the compressor having a suction-pipe containing a shutoff valve and a discharge-pipe containing a check-valve, of a bracket adjacent to the shut-off valve, a stem on the shut-cit valve having a head guided in the bracket, a lever fulcrumed on the bracket, having one arm' connected with said head, a weighted arm on the lever-fulcrum, a catch on the bracket normally engaging the other arm of the lever to lock the shut-off valve in its opened condition, and means actuated by variation in pressure in the gasdischarge line at opposite sides of said check-valve to trip the catch and release the lever to permit the weight to close the shutoff valve.

4. In a refrigerating machine of the character described, the combination with the compressor having a suctionipe contain- 7 shut-ofi' valve having a head guided in thebracket, a lever fulcrumed on the bracket, having one arm connected with said head and a pointed extremity on its other arm, a weighted arm on the lever-fulcrum, a catch pivotally fastened on the bracket and nor mally engaging the point of said extremity, a bell-crank fulcrumed on said catch, a reciprocating bolt on the catch engaged at one end by an arm of the bell-crank and engaging at its opposite end said pointed extremity, and means actuated by variation in pressure in the gas-discharge line at opposite sides of said check-valve to turn the bell-crank for tripping the catch to release the lever and permit the weight to close the shut-ofi valve for the purpose set forth.

5. In a refrigerating machine of the-character described, the combination with the compressor having a suction-pipe containing a shut-off valve and a discharge-pi e containing a check-valve, of catch-mec anism' head at opposite sides of the fulcrum, a pipe for directing the pressure from a point in the d1schargeipe beyond the check-valve against one p unger, and a pipedireeting the pressure from a point at the opposite side of the check-valve against the other plunger, for the purpose set forth.

6. In a refrigerating machine of the character described, the combination with the compressor having a suction-pipe containing a shut-off valve and a discharge-pipe containing a check-valve, of catch-mechanism locking the shut-off valve in its normally-openv condition, and means actuated by variation in pressure in the gas-discharge line at opposite sides of said check-valve to trip the catch-mechanism and permit closure of the shut-off valve, said means comprising a housed headed lever fulcrumed at its head in the housing and having a projecting stem linked to said catch-mechanism, plungercontaining cylinders in the housing-base having pipe-connections below the plungers respectively with the gas-discharge line at opposite sides of the check-valve therein, and springs confined between the ends of said lever-head and said plungers, for the purpose set forth.

7. In a refrigerating machine of the character described, the combination with the compressor having a suction-pipe containing a shut-off valve and a discharge-pipecontaining a check-valve, of catch-mechanism locking said shut-off valve in its normally-open condition, and means actuated by variation in pressure in the gas-discharge line at opposite sides of the check-valve to trip the catch-mechanism and permit closure of the shut-off valve, said means comprising a housing having plunger-containing cylinders in its base, pipes leading into the cylinders from the gas-discharge line respectively at opposite sides of the check-valve therein, a post on said base, a lever having a head at which it is fulcrumed on the post and a stem working through the housingtop and having a link-connection with said catch-mechanism, rods pivotally suspended from the opposite ends of said lever-head, 4 7

and coiled springs confined between the plungers and lever-head, for the purpose set forth.

JULIUS REBSAMEN. In presence of- NELLIE B. DEARBOBN, L. HOLZHALB. 

